$.fn.province_city_county = function(v_province,v_city,v_county){
    	var _self = this;
    	//插入3个空的下拉框
    	//_self.append("<select id='province' name='province'></select>");
    	//_self.append("<select id='city' name='city'></select>");
    	//_self.append("<select id='county' name='county'></select>");
        _self.html("<select id='province' name='province' style='width: 100px'></select>" +
        		"<select id='city' name='city' style='width: 100px'></select>" +
        		"<select id='county' name='county' style='width: 100px'></select>");
    	//分别获取3个下拉框
    	var sel1 = _self.find("select").eq(0);
    	var sel2 = _self.find("select").eq(1);
    	var sel3 = _self.find("select").eq(2);
    	
    	//定义3个默认值
    	_self.data("province",["请选择", ""]);
    	_self.data("city",["请选择", ""]);
    	_self.data("county",["请选择", ""]);
    	//默认省级下拉
    	if(_self.data("province")){
    		sel1.append("<option value='"+_self.data("province")[1]+"'>"+_self.data("province")[0]+"</option>");
    	}
    	//默认城市下拉
    	if(_self.data("city")){
    		sel2.append("<option value='"+_self.data("city")[1]+"'>"+_self.data("city")[0]+"</option>");
    	}
    	//默认县区下拉
    	if(_self.data("county")){
    		sel3.append("<option value='"+_self.data("county")[1]+"'>"+_self.data("county")[0]+"</option>");
    	}
    	$.get('xml/province_city.xml', function(data){
    		var arrList = [];
    		$(data).find('province').each(function(){
    			var $province = $(this);
    			sel1.append("<option value='"+$province.attr('value')+"'>"+$province.attr('value')+"</option>");
    		});
    		if(typeof v_province != 'undefined'){
    			sel1.val(v_province);
    			sel1.change();
    		}
    	});
    	
    	//省级联动控制
    	var index1 = "" ;
    	var provinceValue = "";
    	var cityValue = "";
    	sel1.change(function(){
    		//清空其它2个下拉框
    		sel2[0].options.length=0;
    		sel3[0].options.length=0;
    		index1 = this.selectedIndex;
    		if(index1 == 0){	//当选择的为 "请选择" 时
    			if(_self.data("city")){
    				sel2.append("<option value='"+_self.data("city")[1]+"'>"+_self.data("city")[0]+"</option>");
    			}
    			if(_self.data("county")){
    				sel3.append("<option value='"+_self.data("county")[1]+"'>"+_self.data("county")[0]+"</option>");
    			}
    		} else{
    			provinceValue = $('#province').val();
    			$.get('xml/province_city.xml', function(data){
    				$(data).find("province[value='"+provinceValue+"'] > city").each(function(){
    					var $city = $(this);
    					sel2.append("<option value='"+$city.attr('value')+"'>"+$city.attr('value')+"</option>");
    				});
    				cityValue = $("#city").val();
    				$(data).find("city[value='"+cityValue+"'] > county").each(function(){
    					var $county = $(this);
    					sel3.append("<option value='"+$county.attr('value')+"'>"+$county.attr('value')+"</option>");
    				});

                    if(typeof v_city != 'undefined'){
                        sel2.val(v_city);
                        sel2.change();
                    }

                    if(typeof v_county != 'undefined'){
                        sel3.val(v_county);
                    }
    			});
    		}
    	}).change();
    	//城市联动控制
    	sel2.change(function(){
    		sel3[0].options.length=0;
    		var cityValue2 = $('#city').val();
    		$.get('xml/province_city.xml', function(data){
    			$(data).find("city[value='"+cityValue2+"'] > county").each(function(){
    				var $county = $(this);
    				sel3.append("<option value='"+$county.attr('value')+"'>"+$county.attr('value')+"</option>");
    			});
                if(typeof v_county != 'undefined'){
                	sel3.val(v_county);
                }
    		});
    	}).change();
    	return _self;
    };